The word tun is etymologically related to the word ton for the unit of mass, the mass of a tun of wine being approximately one long ton, which is 2 240 pounds (1 016 kg).

The meaning of TUN is a large cask especially for wine.

Dec 10, 2012 · tun (plural tuns or tunob) A part of the ancient Maya Long Count Calendar system which corresponds to 18 winal cycles or 360 days.

It is derived from the "tun", the term applied to a barrel of the largest size. A good quality lauter tun has rotating rake arms with a central drive unit. The name tun refers to the snails' shell shape …

There are 12 meanings listed in OED's entry for the noun tun, two of which are labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

TUN definition: a large cask for holding liquids, especially wine, ale, or beer. See examples of tun used in a sentence.

tun (tun), n., v., tunned, tun•ning. n. a large cask for holding liquids, esp. wine, ale, or beer. Weights and Measures a measure of liquid capacity, usually equivalent to 252 wine gallons. …